Peerless NSM-0620R01-04
Best box: 1.5 L bass reflex tuned to 144.4 Hz · F3 139.6 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Peerless NSM-0620R01-04 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- Port length (68.1 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 144.4 Hz |
| F3 (-3 dB Cutoff) | 139.6 Hz |
| F6 / F10 Extension | 126.6 Hz / 112.5 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 68.1 cm |
| First Pipe Resonance | 252.0 Hz |
| Estimated MOL @ F3 | 112.5 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 0.46 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 277.4 Hz |
| F3 (-3 dB Cutoff) | 238.7 Hz |
| F6 / F10 Extension | 187.3 Hz / 143.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 88.0 Hz |
| Total Q (Qts) | 0.22 |
| Electrical Q (Qes) | 0.233 |
| Mechanical Q (Qms) | 3.81 |
| Equivalent Volume (Vas) | 4.2 Liters |
| Diaphragm Area (Sd) | 137.0 cm² |
| DC Resistance (Re) | 2.7 Ω |
| Efficiency Bandwidth Product (EBP) | 376.9 |
| Linear Excursion (Xmax) | 6.8 mm |
| Thermal Power (Pe) | 225.0 W |
| Nominal Diameter | 6.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Peerless NSM-0620R01-04?
Load Forge's calculated alignment puts Peerless NSM-0620R01-04 in a 1.5 liter vented enclosure tuned to 144.4 Hz, reaching an F3 cutoff of approximately 139.6 Hz.
Can Peerless NSM-0620R01-04 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.46 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 238.7 Hz.
What port dimensions should be used for Peerless NSM-0620R01-04 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 68.1 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
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